(1) (Critical Path Method) A project management planning and control technique implemented on computers. The critical path is the series of activities and tasks in the project that have no built-in slack time. Any task in the critical path that takes longer than expected will lengthen the total time of the project.

(2) (Cost Per Milli or Mille) Refers to the cost for a thousand of something. For example, banner ads on the Web, which are also known as "impressions," are typically sold on a CPM basis. See banner ad, click-through rate and RPM.

(3) (Copies Per Minute) The rated speed of a computer printer or copy machine.